LeAnn Rimes was in a lot of pain when she took to the stage at a concert in New Jersey on Friday night. In fact the country crooner has described the past few days as being “one of the most painful weeks” of her life.

Rimes, 29, kicked off her tour days after having mouth surgery. Throughout the week the singer has tweeted about being in pain after going to the dentist.

As the week progressed, the pain was obviously getting to her. The night before the start of her tour, she wrote: “Swollen face, tons of pain, but I’m powering through. Hopefully, a good night’s sleep will take away some of the chipmunk look:).”

Rimes didn’t have any intention of letting her audience down though. On Friday she was still enthusiastic. “OK, I’m up…I’m moving…swelling is less, pain is still there. I’m in and on my way to NJ!!! Can’t wait to see my fans tonight!”